diff --git a/lib/Froxlor/Api/ApiParameter.php b/lib/Froxlor/Api/ApiParameter.php
index 72f035cd..6fbb1643 100644
--- a/lib/Froxlor/Api/ApiParameter.php
+++ b/lib/Froxlor/Api/ApiParameter.php
@@ -61,6 +61,12 @@ abstract class ApiParameter
 	 */
 	private function trimArray($input)
 	{
+		if ($input === '') {
+			return "";
+		}
+		if (is_numeric($input) || is_null($input)) {
+			return $input;
+		}
 		if (!is_array($input)) {
 			return trim($input);
 		}
diff --git a/lib/Froxlor/Api/Commands/Admins.php b/lib/Froxlor/Api/Commands/Admins.php
index 58c74f14..044933db 100644
--- a/lib/Froxlor/Api/Commands/Admins.php
+++ b/lib/Froxlor/Api/Commands/Admins.php
@@ -582,7 +582,7 @@ class Admins extends ApiCommand implements ResourceEntity
 				$idna_convert = new IdnaWrapper();
 				$email = $idna_convert->encode(Validate::validate($email, 'email', '', '', [], true));
 				$def_language = Validate::validate($def_language, 'default language', '', '', [], true);
-				$custom_notes = Validate::validate(str_replace("\r\n", "\n", $custom_notes), 'custom_notes', Validate::REGEX_CONF_TEXT, '', [], true);
+				$custom_notes = Validate::validate(str_replace("\r\n", "\n", $custom_notes ?? ""), 'custom_notes', Validate::REGEX_CONF_TEXT, '', [], true);
 				$theme = Validate::validate($theme, 'theme', '', '', [], true);
 				$password = Validate::validate($password, 'password', '', '', [], true);
 
diff --git a/lib/Froxlor/Api/Commands/Domains.php b/lib/Froxlor/Api/Commands/Domains.php
index 4355de44..87a1d302 100644
--- a/lib/Froxlor/Api/Commands/Domains.php
+++ b/lib/Froxlor/Api/Commands/Domains.php
@@ -1451,6 +1451,7 @@ class Domains extends ApiCommand implements ResourceEntity
 			$ipandports = $this->validateIpAddresses($p_ipandports, false, $result['id']);
 			// check ssl IP
 			if (empty($p_ssl_ipandports) || (!is_array($p_ssl_ipandports) && is_null($p_ssl_ipandports))) {
+				$p_ssl_ipandports = [];
 				foreach ($result['ipsandports'] as $ip) {
 					if ($ip['ssl'] == 1) {
 						$p_ssl_ipandports[] = $ip['id'];
diff --git a/lib/Froxlor/Api/Commands/EmailForwarders.php b/lib/Froxlor/Api/Commands/EmailForwarders.php
index 61222cad..a190ee1d 100644
--- a/lib/Froxlor/Api/Commands/EmailForwarders.php
+++ b/lib/Froxlor/Api/Commands/EmailForwarders.php
@@ -84,7 +84,7 @@ class EmailForwarders extends ApiCommand implements ResourceEntity
 			$id = $result['id'];
 
 			// current destination array
-			$result['destination_array'] = explode(' ', $result['destination']);
+			$result['destination_array'] = explode(' ', ($result['destination'] ?? ""));
 
 			// prepare destination
 			$destination = trim($destination);
diff --git a/lib/Froxlor/Api/Commands/IpsAndPorts.php b/lib/Froxlor/Api/Commands/IpsAndPorts.php
index 212dec0e..5c2a25f6 100644
--- a/lib/Froxlor/Api/Commands/IpsAndPorts.php
+++ b/lib/Froxlor/Api/Commands/IpsAndPorts.php
@@ -166,9 +166,11 @@ class IpsAndPorts extends ApiCommand implements ResourceEntity
 			$listen_statement = !empty($this->getBoolParam('listen_statement', true, 0)) ? 1 : 0;
 			$namevirtualhost_statement = !empty($this->getBoolParam('namevirtualhost_statement', true, 0)) ? 1 : 0;
 			$vhostcontainer = !empty($this->getBoolParam('vhostcontainer', true, 0)) ? 1 : 0;
-			$specialsettings = Validate::validate(str_replace("\r\n", "\n", $this->getParam('specialsettings', true, '')), 'specialsettings', Validate::REGEX_CONF_TEXT, '', [], true);
+			$ss = $this->getParam('specialsettings', true, '');
+			$specialsettings = Validate::validate(str_replace("\r\n", "\n", $ss ?? ""), 'specialsettings', Validate::REGEX_CONF_TEXT, '', [], true);
 			$vhostcontainer_servername_statement = !empty($this->getBoolParam('vhostcontainer_servername_statement', true, 1)) ? 1 : 0;
-			$default_vhostconf_domain = Validate::validate(str_replace("\r\n", "\n", $this->getParam('default_vhostconf_domain', true, '')), 'default_vhostconf_domain', Validate::REGEX_CONF_TEXT, '', [], true);
+			$dvd = $this->getParam('default_vhostconf_domain', true, '');
+			$default_vhostconf_domain = Validate::validate(str_replace("\r\n", "\n", $dvd), 'default_vhostconf_domain', Validate::REGEX_CONF_TEXT, '', [], true);
 			$docroot = Validate::validate($this->getParam('docroot', true, ''), 'docroot', Validate::REGEX_DIR, '', [], true);
 
 			if ((int)Settings::Get('system.use_ssl') == 1) {
@@ -177,9 +179,11 @@ class IpsAndPorts extends ApiCommand implements ResourceEntity
 				$ssl_key_file = Validate::validate($this->getParam('ssl_key_file', $ssl, ''), 'ssl_key_file', '', '', [], true);
 				$ssl_ca_file = Validate::validate($this->getParam('ssl_ca_file', true, ''), 'ssl_ca_file', '', '', [], true);
 				$ssl_cert_chainfile = Validate::validate($this->getParam('ssl_cert_chainfile', true, ''), 'ssl_cert_chainfile', '', '', [], true);
-				$ssl_specialsettings = Validate::validate(str_replace("\r\n", "\n", $this->getParam('ssl_specialsettings', true, '')), 'ssl_specialsettings', Validate::REGEX_CONF_TEXT, '', [], true);
+				$sslss = $this->getParam('ssl_specialsettings', true, '');
+				$ssl_specialsettings = Validate::validate(str_replace("\r\n", "\n", $sslss ?? ""), 'ssl_specialsettings', Validate::REGEX_CONF_TEXT, '', [], true);
 				$include_specialsettings = !empty($this->getBoolParam('include_specialsettings', true, 0)) ? 1 : 0;
-				$ssl_default_vhostconf_domain = Validate::validate(str_replace("\r\n", "\n", $this->getParam('ssl_default_vhostconf_domain', true, '')), 'ssl_default_vhostconf_domain', Validate::REGEX_CONF_TEXT, '', [], true);
+				$ssldvd = $this->getParam('ssl_default_vhostconf_domain', true, '');
+				$ssl_default_vhostconf_domain = Validate::validate(str_replace("\r\n", "\n", $ssldvd ?? ""), 'ssl_default_vhostconf_domain', Validate::REGEX_CONF_TEXT, '', [], true);
 				$include_default_vhostconf_domain = !empty($this->getBoolParam('include_default_vhostconf_domain', true, 0)) ? 1 : 0;
 			} else {
 				$ssl = 0;
@@ -401,9 +405,11 @@ class IpsAndPorts extends ApiCommand implements ResourceEntity
 			$listen_statement = $this->getBoolParam('listen_statement', true, $result['listen_statement']);
 			$namevirtualhost_statement = $this->getBoolParam('namevirtualhost_statement', true, $result['namevirtualhost_statement']);
 			$vhostcontainer = $this->getBoolParam('vhostcontainer', true, $result['vhostcontainer']);
-			$specialsettings = Validate::validate(str_replace("\r\n", "\n", $this->getParam('specialsettings', true, $result['specialsettings'])), 'specialsettings', Validate::REGEX_CONF_TEXT, '', [], true);
+			$ss = $this->getParam('specialsettings', true, $result['specialsettings']);
+			$specialsettings = Validate::validate(str_replace("\r\n", "\n", $ss ?? ""), 'specialsettings', Validate::REGEX_CONF_TEXT, '', [], true);
 			$vhostcontainer_servername_statement = $this->getParam('vhostcontainer_servername_statement', true, $result['vhostcontainer_servername_statement']);
-			$default_vhostconf_domain = Validate::validate(str_replace("\r\n", "\n", $this->getParam('default_vhostconf_domain', true, $result['default_vhostconf_domain'])), 'default_vhostconf_domain', Validate::REGEX_CONF_TEXT, '', [], true);
+			$dvd = $this->getParam('default_vhostconf_domain', true, $result['default_vhostconf_domain']);
+			$default_vhostconf_domain = Validate::validate(str_replace("\r\n", "\n", $dvd ?? ""), 'default_vhostconf_domain', Validate::REGEX_CONF_TEXT, '', [], true);
 			$docroot = Validate::validate($this->getParam('docroot', true, $result['docroot']), 'docroot', Validate::REGEX_DIR, '', [], true);
 
 			if ((int)Settings::Get('system.use_ssl') == 1) {
@@ -412,9 +418,11 @@ class IpsAndPorts extends ApiCommand implements ResourceEntity
 				$ssl_key_file = Validate::validate($this->getParam('ssl_key_file', $ssl, $result['ssl_key_file']), 'ssl_key_file', '', '', [], true);
 				$ssl_ca_file = Validate::validate($this->getParam('ssl_ca_file', true, $result['ssl_ca_file']), 'ssl_ca_file', '', '', [], true);
 				$ssl_cert_chainfile = Validate::validate($this->getParam('ssl_cert_chainfile', true, $result['ssl_cert_chainfile']), 'ssl_cert_chainfile', '', '', [], true);
-				$ssl_specialsettings = Validate::validate(str_replace("\r\n", "\n", $this->getParam('ssl_specialsettings', true, $result['ssl_specialsettings'])), 'ssl_specialsettings', Validate::REGEX_CONF_TEXT, '', [], true);
+				$sslss = $this->getParam('ssl_specialsettings', true, $result['ssl_specialsettings']);
+				$ssl_specialsettings = Validate::validate(str_replace("\r\n", "\n", $sslss ?? ""), 'ssl_specialsettings', Validate::REGEX_CONF_TEXT, '', [], true);
 				$include_specialsettings = $this->getBoolParam('include_specialsettings', true, $result['include_specialsettings']);
-				$ssl_default_vhostconf_domain = Validate::validate(str_replace("\r\n", "\n", $this->getParam('ssl_default_vhostconf_domain', true, $result['ssl_default_vhostconf_domain'])), 'ssl_default_vhostconf_domain', Validate::REGEX_CONF_TEXT, '', [], true);
+				$ssldvd = $this->getParam('ssl_default_vhostconf_domain', true, $result['ssl_default_vhostconf_domain']);
+				$ssl_default_vhostconf_domain = Validate::validate(str_replace("\r\n", "\n", $ssldvd ?? ""), 'ssl_default_vhostconf_domain', Validate::REGEX_CONF_TEXT, '', [], true);
 				$include_default_vhostconf_domain = $this->getBoolParam('include_default_vhostconf_domain', true, $result['include_default_vhostconf_domain']);
 			} else {
 				$ssl = 0;
diff --git a/tests/Cron/TaskIdTest.php b/tests/Cron/TaskIdTest.php
index 397ffe87..21e7b6a1 100644
--- a/tests/Cron/TaskIdTest.php
+++ b/tests/Cron/TaskIdTest.php
@@ -46,17 +46,7 @@ class TaskIDTest extends TestCase
 
 		$isNegativeValid = TaskId::isValid(-1);
 		$this->assertFalse($isNegativeValid, "Negative task should be invalid");
-	}
 
-	public function testAcceptNewTaskId()
-	{
-		$isTESTTASKValid = TaskIdExtended::isValid(10101010);
-		$this->assertTrue($isTESTTASKValid);
-	}
-
-
-	public function testFixedTaskIdTable()
-	{
 		$isTESTTASKValid = TaskIdExtended::isValid(10101010);
 		$this->assertTrue($isTESTTASKValid);
 	}